1.) A 95-meter long train begins uniform acceleration from rest. The front of the train has a speed of 25 meter/second when it passes a railway worker who is standing 180 m from wherer the front of the train started. What will be the speed of the last car as it passes the worker.
2.) A stone is dropped from the roof of a high building. A 2nd stone is dropped 1.50 seconds later. How far apart are the stones when the 2nd one has reached a speed of 12.0 meters/second.
3.)Two students are asked to find the height of a particular building using a barometer. Instead of using the barometer as an altitude-measuring device , they take it to the roof of the bulding and drop it off, timing its fall. One student reports a fall time of 2.0 sec., and the other, 2.3 sec.. How much difference does the 0.3 sec make for the estimates of the building's hieght.
2006-09-23
05:01:31
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3 answers
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asked by
Anonymous